Related Clues:

• Brass
• Openings
• Orchestra section
• Opportunities, so to speak
• They may be sliding
• They may be locked
• Some people lock them
• Means of escape
• They're often hit in rush-hour traffic
• Brass section
• Some revolve
• Taxi tooters
• They may be locked or blown
• Trumpet and bugle
• Some swingers